Query: find rows that do not belong to a. This SQL tutorial explains how to use the SQL NOT condition with syntax and examples. Click the Try It button next to an example to test it for yourself in our SQL Editor. The SQL NOT condition (sometimes called the NOT Operator ) is used to negate a condition in the WHERE clause of a SELECT, INSERT, UPDATE, or DELETE statement.
Using NOT IN operator with null values. Here null is in the list disappeare because NULL NULL. When checking for existence, you should use the EXISTS operator if the columns involved are nullables. You have a list of something else than numbers. You need to know the position of the values in the list.
The NOT IN operator is used when you want to retrieve a column that has no entries in the table or referencing table. In addition, PostgreSQL executes the query with the IN operator much faster than the same query that uses a list of OR operators. You can combine the IN operator with the NOT operator to select rows whose values do not match the values in the list. I came across a forum post where someone wanted to use SQL NOT LIKE with multiple values. They were trying to exclude multiple values from the SQL query, but they were needing to use wildcards.
If you wanted to just filter values without wildcards, you would use the following query.